水样残渣量与总放射性水平之间的关系分析

Analysis of the Correlation between dry residual and Total Radioactivity in Waters

目的为了解水样残渣量与总α总β放射性水平之间的关系。方法选择苏州地区不同水体作为研究对象,应用BH1216型低本底α/β放射性测量装置,用241Am和优级纯氯化钾分别作为总α和总β放射性测量的标准源,采用中等厚度相对测量法测定样品中的总α总β放射性活度。结果水样残渣量与总α放射性活度之间相关性较好(r=0.517,P(0.01),而残渣量与总β放射性活度之间的相关性相对较差(r=0.435,0.01<P<0.05)。结论水体的放射性随着其矿化度的增大而增大,应当对水处理过程中降低放射性核素浓度的措施进行探讨和规范化,确保饮用水中放射性核素的水平保持在可合理达到的尽可能低的水平。

Objective To analyzes the correlation between dry residual and total radioactivity in Waters. Methods We selected different waters in Suzhou to be studied. The gross alpha and gross beta activities in waters were measured with mid - thickness relative activity method associated with the normal source of 241 Am and high purity KCl by using a low level alpha/ beta counting system model BH1216. Results For the samples, correlation between dry residual and gross alpha activities was more statistically significant （P 〈 0.01 ） than correlation between dry residual and gross beta activities （0.01 〈 P 〈 0.05）. Their correlation values were 0.517 and 0. 435, respectively. Conclusions The general rule, the lower the total dissolve solids （ dry residual or conductivity values）, the lower the radioactivity. We should standardize the traditional methods of water purification, aiming at the quantitative elimination of the presence in solution of the radionuclides.